摘要:
The invention relates to a screen changer (1) having a working apparatus (2) mounted downstream or upstream from the direction of flow of a liquid plastic flow, the housing (3) of which is tightly attached to the housing (4) of the screen changer (1). It also comprises a flange-like connecting ring (5) that may be tightly inserted into a groove (6) in the housing of the screen changer (1) matching the size of the connecting ring (5). The ring may be fixed in the housing of the screen changer (1) by means of clamping screws (7, 8) engaging at an angle α on the edge of the connecting ring (5). It also has a through-flow duct (11) matching the inlet hole (9) in the working apparatus (2) and the outlet hole (10) in the screen changer (1), wherein the working apparatus (2) is tightly attached to the connecting ring (5) on the side opposite to the housing (1) of the screen changer.
摘要:
This invention concerns a process for monitoring the degree of wear of a compression worm (8) which conveys a plasticized material, in particular, plastic, against an element that exerts a resistance and is located in a worm housing (4). To this effect, the pressure of the material conveyed is measured at two points disposed at intervals along the direction of travel. These two points are situated at both sides of a resistance body (12) towards which the compression worm (8) conveys. The difference between the two pressures measured is used to display the degree of wear of the worm (5) and its housing. A device for that purpose has an opening (18) which penetrates the wall (20) of the housing (4) of the worm (5) in the region of its thread or in a region immediately adjacent thereto. An additional opening (19) penetrates the wall of this housing (4); both openings (18, 19) are disposed axially at a distance from each other. A pressure sensor (22, 23) is linked to each opening (18, 19).
摘要:
Die Erfindung betrifft ein Filterelement für Kunststoffschmelzen mit mehreren Filterschichten zum austauschbaren Einsatz in einem zwischen Extruder und Spritzdüse angeordneten Filterhalter. Wenigstens zwei Siebgewebe (2, 4, 6) gleicher Filterfeinheit sind hintereinander angeordnet, die durch wenigstens ein grobmaschiges Siebgewebe (3, 5) getrennt sind, wobei die teilweise für herauszufilternde Partikel durchlässige Filterfläche der vorderen Siebgewebe (2, 4) kleiner ausgebildet ist. Derartige Filterelemente werden bei der Filtration von Schmelzen oder Flüssigkeiten zur Rückhaltung von Schmutzpartikeln benötigt.
摘要:
Disclosed is a device for degassing thermoplastics, the device having a first worm-conveyor zone (11) for feeding in the material to be treated. The plastified plastic material flows out of the housing (10) of this worm-conveyor zone (11) through a connecting channel (15) to a filter (16) and from there through an inlet aperture (17) into the housing (18) of a second worm-conveyor zone (19) which conveys the material to an outlet (21). Lying between the two equiaxial worm-conveyor zones (11, 19) is a seal zone (26) which prevents the filter (16) from being bypassed. Immediately downstream of the inlet aperture (17) is a baffle barrier (28) which forces the stream of plastic into a tubular shape. The baffle barrier (28) can be adjusted relative to the inlet aperture (17) in the longitudinal direction and has a cross-section which tapers towards the second worm-conveyor zone (19). This shortens the migration path for gas bubbles from the plastic material and thus facilitates the degassing through the degassing aperture (20).
摘要:
Die Erfindung bezieht sich auf eine Filtereinrichtung für Strangpressen und Spritzgießmaschinen, wobei die Siebelemente durch einen Kerzenfilter gebildet sind und ggf. durch mehrere Kerzenfilter, die in Umfangsrichtung auf dem Siebbolzen sich parallel zur Längsachse des Siebbolzens erstreckend angeordnet sind und zu Filterzwecken von außen nach innen und zu Rückspülzwecken von innen nach außen durchströmt werden.
摘要:
Ein Schmutzfilter für zäh fließfähige, thermoplastische Medien besteht aus einem in einem Filterraum 13 angeordneten Sperrkörper 15. Der Sperrkörper definiert im Filterraum einen Sperrspalt 34 für das fließende Medium. Durch Verschieben des Sperrkörpers in Richtung der Flußachse kann der Sperrspalt zu einem Reinigungsspalt erweitert werden. Zum Verschieben des Sperrkörpers dient eine Verstellvorrichtung 32.